{"title":"URBAN MOBILITY SCENARIO EVALUATION IN A POST-COVID-19 ERA","authors":"OVIDIU-LAURENȚIU Harpalete","doi":"10.56958/jesi.2021.6.4.6","DOIUrl":"https://doi.org/10.56958/jesi.2021.6.4.6","url":null,"abstract":"This paper brings an evaluation of different mobility scenarios in the context of COVID-19 pandemic. The mobility is a fundamental human need, a manifestation of an integrated society and an individual and rational act. Building scenarios offer a means of dealing with critical issues of innovation, reflexivity and framing in analysing change in socio-economic systems. Forecasting, exploratory or backcasting scenarios, they are all analysed from the point of view of collective behavioral choice, public policy or technology. The pandemic brought first a serious decrease in traffic and mobility imposing a lockdown, but after it generated an amplified transition to private motorised transport, as public transport is a potent force in disease spread. And this is translated by congestion and pollution. Luckily, based on the same priciples, walking and cycling gained particular importance. A key element in the concept of sustainable development is the reduction of greenhouse gas emissions.","PeriodicalId":52936,"journal":{"name":"Journal of Engineering Sciences and Innovation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41709213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nino Ratiani, N. Ilias, N. Machavariani, Nana Razmadze
{"title":"Assessing construction risk factors and ensuring safety","authors":"Nino Ratiani, N. Ilias, N. Machavariani, Nana Razmadze","doi":"10.56958/jesi.2021.6.4.7","DOIUrl":"https://doi.org/10.56958/jesi.2021.6.4.7","url":null,"abstract":"Construction is one of the most dangerous industries, which in physical terms is associated with the highest load. Trauma and accident statistics are high. Due to the multidisciplinary nature of employees in the construction sector, considering the impact of harmful and dangerous factors and difficulties of operating construction and transport equipment, construction is one of the most dangerous areas. During the 2020-2021 pandemic, various problems arose in the construction sector. The problem of the construction industry, delays caused by pandemics, the main causes of safety breaches, hazard detection, risk management outcomes are discussed in the article and recommendations are given to improve them. Research methods: Analysis of the theoretical and practical experience of existing means of occupational safety, working on statistical data on traumas and accidents, develop methods for identifying hazards, and assessing risks based on specific examples. Based on theoretical studies and analysis of existing conditions, measures have been developed to improve occupational safety. The importance of the mechanism for predicting unforeseen delays in the construction sector, the causeand-effect relationship between high statistics of injuries and accidents in conditions of excessive working hours. The complexity of the construction field is presented and analyzed with all clarity, taking into account the multitude of existing risk factors, the stages of risk assessment and management are schematically depicted, the criteria for determining the probability of events.","PeriodicalId":52936,"journal":{"name":"Journal of Engineering Sciences and Innovation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46347670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Interdisciplinarity: artificial intelligence and chemical engineering","authors":"A. Woinaroschy","doi":"10.56958/jesi.2021.6.4.9","DOIUrl":"https://doi.org/10.56958/jesi.2021.6.4.9","url":null,"abstract":"There are exposed implications of artificial intelligence in addressing important problems from a technical and economic point of view whose traditional solution would not be possible or would require a huge computational time: selection of the most efficient catalyst, and determination of the optimal sequence of processes for the separation into individual components of the multicomponent mixtures in the liquid state.","PeriodicalId":52936,"journal":{"name":"Journal of Engineering Sciences and Innovation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44453701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Transdisciplinarity based on Category Theory","authors":"I. Cuncev","doi":"10.56958/jesi.2021.6.4.10","DOIUrl":"https://doi.org/10.56958/jesi.2021.6.4.10","url":null,"abstract":"Physical reality can be characterized by the theory of categories that brings to the fore transdisciplinarity through invariants and structural and management patterns common to many fields. Applying the model of thinking the universe of systems according to category theory, many opportunities open for their modeling, but also for their planning, management and evaluation procedures. Structures and concepts in physical reality, as well as the relationships between them, become objects and morphisms through category theory, thus being valid in many fields. Objects can be aggregated through the relationships between them, in increasingly complex objects that meet the requirements of users in the knowledge society. In this respect, category theory provides the working tools for transdisciplinary modeling of systems on different levels of increasingly sophisticated reality","PeriodicalId":52936,"journal":{"name":"Journal of Engineering Sciences and Innovation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44584126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Bobina, V. Ordodi, A. Kellenberger, N. Vaszilcsin
{"title":"Expired streptomycin as corrosion inhibitor for carbon steel in acetic acid - sodium acetate buffer solution","authors":"M. Bobina, V. Ordodi, A. Kellenberger, N. Vaszilcsin","doi":"10.56958/jesi.2021.6.4.4","DOIUrl":"https://doi.org/10.56958/jesi.2021.6.4.4","url":null,"abstract":"Corrosion inhibition of carbon steel in buffer acid solutions by expired streptomycin was studied by weight loss method, linear polarization, electrochemical impedance spectroscopy, as well as scanning electron microscopy. It was found that streptomycin reduces the metal corrosion rate, and the inhibition efficiency increases proportionally with the drug content. A high efficiency has been obtained for 10–3 M amount of inhibitor. Tafel polarization results indicate that the drug is active especially on the cathodic side and less on the anodic dissolution of iron reaction, acting as a mixed type corrosion inhibitor. The double layer capacitance of the metal - buffer solution interface, polarization resistance and film formation on the carbon steel surface have been emphasized by electrochemical impedance measurements. The scanning electron micrographs of the carbon steel samples in blank solutions have revealed a severe corrosion on the samples surface, while in the presence of the expired drug, the surface has remained almost unaffected. Electrochemical behavior of streptomycin has been also investigated by cyclic voltammetry.","PeriodicalId":52936,"journal":{"name":"Journal of Engineering Sciences and Innovation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43035549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"White wine protein instability: a review","authors":"Andreea Hortolomeu, I. Nistor","doi":"10.56958/jesi.2021.6.4.3","DOIUrl":"https://doi.org/10.56958/jesi.2021.6.4.3","url":null,"abstract":"The presence of protein compounds in wine leads to decreased organoleptic quality of finished products such as clarity and hue. These compounds have important nutritional values. A large part of the proteins present in wine are closely related to the pathogenesis process. Disturbance in wine samples occurs as a consequence of the presence of several non-protein factors such as the presence of phenolic compounds, metals and pH. To date, a wide range of procedures are known for the protein of wine precipitation in order to determine the total protein content of wine samples, using solutions such as: trichloroacetic acid (TCA), acetone, ethanol, etc. Numerous techniques specific to the process of protein stability are also known and developed. The best known techniques for determining protein stability are: thermal with the addition of chemicals, bentonite, tannin, ProtoCheck, acetone respectively combined (hot test + tannin, etc.).","PeriodicalId":52936,"journal":{"name":"Journal of Engineering Sciences and Innovation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44324098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"NMR studies of rotamers with multi-substituted amides","authors":"JIA-XIANG Zhang, Lei-Yang Zhang, Naixing Wang, Yue-Hua Wu, Zhang Yan, D. Lucan","doi":"10.56958/jesi.2021.6.4.2","DOIUrl":"https://doi.org/10.56958/jesi.2021.6.4.2","url":null,"abstract":"Rotamers existed in the multi-substituted amide play an important role in the chemical reactivity function. Diverse chemical reactivity of substrates which contain an amide group is significantly affected by their rotamers. In this paper, rotamers of amides were studied and confirmed by means of NMR spectra. It was found that the ratio of related rotamers of amides depend on the amides bulk. When the nitrogen atom is located in the ring rigid structure, the rotation of C-N bond is limited and it is difficult to produce rotational isomers. In addition, we also found that substituted groups in phenyl ring cannot affect the ratio of related rotamers.","PeriodicalId":52936,"journal":{"name":"Journal of Engineering Sciences and Innovation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43385717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Behavior at 1100°C of nickel–based alloys strengthened by MC carbides with M = Tantalum and Hafnium","authors":"D. A. Kane, L. Aranda, P. Berthod","doi":"10.56958/jesi.2021.6.4.1","DOIUrl":"https://doi.org/10.56958/jesi.2021.6.4.1","url":null,"abstract":"The metallurgical principle constituted by a chromium–rich metallic matrix associated with eutectic script monocarbides represents a promising way in terms of high temperature performance. In this work, focus was done on polycrystalline nickel–based alloys reinforced by monocarbides involving both tantalum and hafnium, with as objectives exploring the microstructures that can be obtained and the metallurgical, chemical and mechanical behaviors of what they can be able. Two alloys were synthesized by foundry under inert atmosphere. Their as–cast microstructures were visualized by electron microscopy and their behavior at high temperature were explored, for the following temperature and time parameters: 1100°C and 50 hours for all tests. The obtained results show that the carbide population obtained after solidification is mainly composed of MC carbides in both cases but it is composed of MC carbides only for the alloy with more hafnium than tantalum. The morphological resistance of the MC carbides is good for the test conditions for both alloys. Concerning oxidation, a chromia–forming behavior was observed in the two cases, with furthermore an obvious good resistance against scale spallation at cooling. The oxidation–induced subsurface alloy degradations and the heat–induced bulk microstructure deteriorations were very limited. The bending tests under constant load allow the sample demonstrating good creep resistance. To summarize both alloys appeared as good bases for developing quite usable superalloys for this temperature where the high performance ’ nickel–based single crystals start to encounter serious problems as consequences of the loss of their reinforcing particles.","PeriodicalId":52936,"journal":{"name":"Journal of Engineering Sciences and Innovation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49455769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mössbauer studies on steel samples","authors":"I. Bibicu","doi":"10.56958/jesi.2021.6.3.7","DOIUrl":"https://doi.org/10.56958/jesi.2021.6.3.7","url":null,"abstract":"\"The paper presents the studies on the steels samples performed by Mössbauer spectroscopy. The 57Fe isotope is most studied isotope by this method. The first studies were realized in the transmission geometry. Thus were studied industrial Fe-C steels, Fe-Si electrotechnical steels, the action of an organic inhibitor on the corrosion of OL37 steel and the compound formed at the Fe-Sn interface of a babbit bearing. The following studies were concentrated on the surface studies. The development of new detectors for surface studies was accomplish. The corrosion of industrial carbon steel in diluted ammoniacal media was studied. The inhibition effect of three organic compounds on the corrosion of carbon-steel in ammoniacal solutions was determined. The corrosion of industrial carbon steel in HCl solutions was investigated. The inhibition effect of five organic compounds for samples corroded in solutions of HCl were determined. Low carbon Fe-C steel surface has been studied before and after electrolytic galvanisation. \"","PeriodicalId":52936,"journal":{"name":"Journal of Engineering Sciences and Innovation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45238357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Mărguță, E. Herghelegiu, C. Tâmpu, S. Mazurchevici, D. Nedelcu
{"title":"Technological parameters influence on biodegradable injected polymers during water jet cutting","authors":"D. Mărguță, E. Herghelegiu, C. Tâmpu, S. Mazurchevici, D. Nedelcu","doi":"10.56958/jesi.2021.6.3.2","DOIUrl":"https://doi.org/10.56958/jesi.2021.6.3.2","url":null,"abstract":"\"Arbofill Fichte and Arboblend V2 Nature are polymers with high-performance functional characteristics and which have the potential to replace plastics based on nonrenewable resources from various sectors of activity. The present study aims to analye from topographical point of view the behavior of injected parts during the processing by cutting with abrasive water jet. The materials behavior, as expected, in any machining or manufacturing process is influenced by the technological parameters, whether they are kept constant (for example the part thickness, the abrasive material, the distance between the cutting head and the part) or variable (pressure, traverse speed and abrasive material flow). In this sense, the purpose was to obtain data regarding the most used roughness parameter, Ra, and based on them some solutions for optimizing the working parameters will be provided, so that the surfaces quality to be as good as possible. The results showed that the technological parameter \"\"abrasive material flow\"\" has the greatest influence on the roughness, ie lower values of roughness for the situation of using a larger amount of abrasive. \"","PeriodicalId":52936,"journal":{"name":"Journal of Engineering Sciences and Innovation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45714166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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